TITLE

Effect of acidity of in-office bleaching gels on tooth sensitivity and whitening: a two-center double-blind randomized clinical trial

AUTHOR(S)
Loguercio, A.; Servat, F.; Stanislawczuk, R.; Mena-Serrano, A.; Rezende, M.; Prieto, M.; Cereño, V.; Rojas, M.; Ortega, K.; Fernandez, E.; Reis, A.
PUB. DATE
December 2017
SOURCE
Clinical Oral Investigations;Dec2017, Vol. 21 Issue 9, p2811
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Objectives: The study aimed to compare the tooth sensitivity (TS) and bleaching efficacy of two hydrogen peroxide gels with different pHs (acid pH [Pola Office, SDI] and the neutral pH [Pola Office+, SDI]) used for in-office bleaching. Materials and methods: Fifty-four patients from Brazil and Chile, with right superior incisor darker than A2, were selected for this double-blind, split-mouth randomized trial. Teeth were bleached in two sessions, with 1-week interval. Each session had three applications of 8 min each, according to the manufacturer's instructions. The color changes were evaluated by subjective (Vita Classical and Vita Bleachedguide) and objective (Easy shade spectrophotometer) methods. Participants recorded TS with 0-10 visual analog scale. Color change in shade guide units (SGU) and Δ E was analyzed by Student's t test ( α = 0.05). The absolute risk and intensity of TS were evaluated by McNemar's test and Wilcoxon-paired test, respectively ( α = 0.05). Results: All groups achieved the same level of whitening after 30 days of clinical evaluation. The use of a neutral in-office bleaching gel significantly decreases the absolute risk of TS (28%, 95% CI 18-41) and intensity of TS when compared to the acid bleaching gel (absolute risk of 50%, 95% CI 37-63). Conclusion: The use of a neutral in-office bleaching agent gel produced the same whitening degree than an acid bleaching gel but with reduced risk and intensity of tooth sensitivity. Clinical significance: Clinicians should opt to use in-office bleaching with a neutral gel than an acid product because the former causes a significant lower risk and intensity of tooth sensitivity.
ACCESSION #
126306432

 

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